BRYOZOA 



Fig. 2<7. Rctcpora protecta sp. nov. X 25 From N° 620. 



ib. do do Dorsal surface X 6. 



ic. do do Operculum. X 85. 



là. do do Mandible. X 85. 



20. do do Avicularium. X 85. 



3a. Retepora leprahoides sp. nov. X 25. From X*" 742. 



3b. do do Dorsal surface. X 6. 



3c. do do Operculum. X 85. 



3d. do do Avicularium. X 85. 



4c?. Retepora frigida sp. nov. x 25. From N° 345. 



4A. do do Dorsal surface. X 6. 



4c. do do Aperture. X about 85. 



/[d. do do Operculum. X 85. 



\e. do do Mandibles. X 85. 



4/. do do Ovicell. X 85. 



5(7. Retepora lœvigata sp. nov. X 25. From N° 322. 



5b. do do Natural size. 



5c. do do Aperture showing the teeth at a lower level. x 85. 



5d. do do Operculum X 85. 



6(7. Calcareous section of Retepora showing the zoœcial and dorsal layer, with the 

 Unes of the vibices also visible, (a) suboral pore entering the zoœcial chamber 

 considerably lower down than the aperture; (ov) ovicell; (av) aviculariam chamber; 

 (v) vibices. This is typical Retepora, but is practically drawn from R. crassa 

 Bush. Challenger spécimen. X 25. 



6b. The same section, showing a break at the Une of the vibices. X 25o. 



7e?. Retepora gelida sp. nov. X 25. From N° 683. 



jb. do do Dorsal surface. X 6. 



je. do do Operculum X 85. 



yd. do do .Mandibles. X 85. 



8(7. Retepora bilaminata nov. X 25. From S. Africa. 



Sb. do do Aperture. X 85. 



8c. do do Operculum X 85. 



8d. do do Mandible. X 25o. 



g. Retepora projecta, var. crassa nov. Natural size. From N° 3og. 



10a. Retepora hippocrepis sp. nov. Natural size. From N° 568. 



106. do do Anterior surface. X 25. From N° 568. 



ioc. de do Dorsal surface. X 6. 



iod. do do Operculum. X 85. 



ioe,/,g. do do Mandibles. X 85. 



PLATE VII 



Fig. la. Osthimosia clavata sp. nov. X 25. From N° 428. 



ib. do do Natural size. 



